This study aimed to prepare a bio-based organic adsorbent (W-PEI) with amine functionalization via Schiff’s reaction without carbonization of biomass. The bio-based organic adsorbent was prepared from wheat bran husk (WH), and amine functionalized to absorb CO2 gas by conjugating polyethyleneimine (PEI) via Schiff’s reaction to the aldehyde groups of periodated WH (p-WH). Then, the bio-based organic adsorbent was compounded with low-density polyethylene (LDPE) using a twin screw extruder. The polymeric composites (LDPE/W-PEI) and W-PEI were studied to characterize chemical structure, thermal properties, and CO2 adsorption ability. The CO2 adsorption capacity was measured by thermogravimetric analysis (TGA), and the analysis was performed through the exchange of N2 and CO2 under isothermal conditions at 75 °C. The amount of CO2 adsorption was 0.425 mmol/g of W-PEI powder, while that of polymeric composite (LDPE/W-PEI_20%) containing 20 wt% W-PEI was 0.034 mmol/g, which corresponds to an adsorption efficiency of 40% compared to that of the powder state. Therefore, polymeric composites with improved CO2 gas adsorption could be successfully applied to food packaging and building materials. [Figure not available: see fulltext.].
Bibliographical notePublisher Copyright:
© 2020, The Polymer Society of Korea and Springer.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry